Phaser 6121MFP Service Manual 3-87
Error Messages and Codes
3FFF Control ROM Failure
Possible causes:
• The copier determines that there is an error if writing to the flash ROM fails
during upgrading of the firmware.
• When the power switch is turned ON, the error indicator lights up steadily and
a corresponding message appears on the display.
• If this error message appears, no operations are possible. It is not possible to
upgrade the firmware from a PC connected through USB connection.
Initial Actions
Power down and reboot the printer.
Procedure
CF01 Controller Failure
The printer determined that there is an NVRAM failure. Contact a Xerox
representative to correct this error.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Engine Control Board, PL13.0.20
■ Image Processor Board,
PL13.0.29/30
■ Board Locations (page 2-10)
■ Map 1 - Engine Control Board
Plug/Jack Locator (page 10-5)
Troubleshooting Procedure Table
Step Action and Questions Yes No
1 Identify the specific firmware that is
responsible for the error, and then
rewrite the firmware (page A-15).
Does the problem persist?
Go to step 2. Complete.
2 Unplug the NVRAM chip on the Engine
Control Board, and then plug the chip
back in.
Does the problem persist?
Go to step 3. Complete.
3 Change the Engine Control Board
(page 8-59).
Does the problem persist?
Go to step 4. Complete.
4 Change the Image Processor Board
(page 8-66).
Complete.
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